   (did-mount [_] :did-mount)
   (will-unmount [_] :will-unmount)
   (will-update [_ _ _] :will-update)
+  (did-update [_ _ _] :did-update)
   (will-receive-props [_ _] :will-receive-props)
   (render [_] :render)
   (render-state [_ _] :render-state))

  (did-mount [_] :did-mount)
  (will-unmount [_] :will-unmount)
  (will-update [_ _ _] :will-update)
  (will-receive-props [_ _] :will-receive-props)
  (render [_] :render)
  (render-state [_ _] :render-state))

      (is (= :did-mount (om/did-mount c)))
      (is (= :will-unmount (om/will-unmount c)))
      (is (= :will-update (om/will-update c nil nil)))
      (is (= :did-update (om/did-update c nil nil)))
      (is (= :will-receive-props (om/will-receive-props c nil)))
      (is (= :render (om/render c)))
      (is (= :render-state (om/render-state c nil)))))
